This project that we gave our high schoolers gave them all sorts of troubles! Most folks are used to thinking in terms of black on white – you draw a black line on a white paper and then add value if you want to give volume to the form. But this assignment was to draw white on black. The darkest value was already there; the student’s job was to draw in the lights without drawing a bunch of white lines. This proved to be almost impossible as I saw a lot of white line skulls. Sheesh.
On another note, this is one more point in my don’t-ever-throw-anything-away-ever column. The surface I am drawing on here is the remnants of a black mat. There’s a stack of these sitting in the art room just waiting for some good drawings!